Solar Batteries Perth
Middle Swan Solar supplies and installs solar batteries across Perth, for new solar systems and for homes that already have panels. A battery stores the spare power your panels make during the day, so you can use it at night instead of buying it from the grid. With Synergy charging over 30 cents per kWh and paying as little as 2 cents for daytime exports, a battery lets you keep far more of the solar you make.
We size every battery to your power bills, apply all eligible rebates to your written quote and handle the paperwork for you. Below, you can compare the batteries we install, check which rebates you can get, and book your free battery quote.
Why Solar Batteries Make Sense in Perth
Perth’s electricity prices make a clear case for solar battery storage.
Under Synergy’s Distributed Energy Buyback Scheme, the solar you export earns just 2 cents per kWh for most of the day, and 10 cents per kWh between 3pm and 9pm. But every unit you buy back from the grid costs over 30 cents. That gap, between what you earn and what you pay, is where a battery earns its return.
Perth also gets around 5 to 6 peak sun hours a day, so most homes with a 6.6kW system make more power than they use in daylight. A battery stores that surplus for the evening, instead of exporting it for very little.
How much you save depends on your evening power use and the battery size. See typical savings and payback in our solar battery cost guide.
Solar Battery Brands We Install in Perth
We install a focused range of premium home batteries. We don’t sell every brand on the market, only the ones we trust to perform in Perth’s climate over the long term.
Enphase IQ Battery 5P
The Enphase IQ Battery 5P is the battery we recommend most for Perth homes, especially homes with Enphase microinverters. Each 5 kWh module has six built-in microinverters, so there’s no single point of failure.
Key specifications:
- Usable capacity: 5 kWh per module, stackable for more storage
- Round-trip efficiency: 96% (DC), 90% (AC)
- Warranty: up to 15 years or 6,000 cycles
- Chemistry: Lithium Iron Phosphate (LFP), which is more heat-tolerant than older NMC batteries
- Backup: yes, with the IQ System Controller
Why it suits Perth: LFP chemistry copes better with Perth’s 40°C+ summer days, and the long warranty gives strong long-term cover. As a Platinum Enphase installer, we’re among the most experienced Enphase battery installers in Perth.
Pricing: depends on how many modules you need. See our Enphase battery installation cost guide.
Tesla Powerwall 3
The Tesla Powerwall 3 is Australia’s best-known home battery and a strong all-in-one choice. It has a built-in hybrid solar inverter, so many homes don’t need a separate inverter.
Key specifications:
- Usable capacity: 13.5 kWh
- Continuous power output: 5 kW to 11.04 kW, depending on setup
- Solar input: up to 20 kW across 3 MPPTs
- Solar-to-battery-to-home efficiency: 89%
- Warranty: 10 years
Why it suits Perth: it handles big household loads like ducted air conditioning and pool pumps, and can back up your home during a power outage. We’re certified Tesla Powerwall installers in Perth.
BYD Battery-Box Premium HVM
BYD is one of the world’s largest battery makers. The Battery-Box Premium HVM is a modular high-voltage battery that works with many hybrid inverters.
Key specifications:
- Module size: 2.76 kWh per module, stackable from 8.3 kWh to 22.1 kWh
- Chemistry: Lithium Iron Phosphate (LFP)
- Warranty: 10 years (conditions apply)
- Inverter compatibility: Sungrow, GoodWe, Fronius and SMA (depends on model and battery size)
- Backup: depends on your inverter set-up
Why it suits Perth: BYD offers strong value per kWh. It’s a smart choice for homes focused on cutting bills rather than backup, especially if you already have a compatible hybrid inverter.
Note: BYD batteries can’t pair with Enphase microinverters or the Powerwall’s built-in inverter. We’ll tell you at quote stage whether your inverter is compatible.
Pricing: see our solar battery cost guide.
Sonnen Battery
The Sonnen battery is a German-engineered premium battery known for its long cycle life. It is designed for households that prioritise longevity and engineering quality, particularly those with high daily cycling requirements, such as homes with EVs, pools or large air conditioning loads.
Solar Battery Comparison for Perth Homes
| Battery Brand & model | Usable capacity kWh | Warranty Years / cycles | Efficiency Round-trip | Backup Power outage | Best for Perth homes |
|---|---|---|---|---|---|
| Recommended Enphase IQ Battery 5P | 5 kWh Per module, stackable | Up to 15 years or 6,000 cycles | 96% DC 90% AC | Yes With IQ System Controller | Homes with Enphase microinverters, modular growth |
| Tesla Powerwall 3 | 13.5 kWh Built-in solar inverter | 10 years | 89% Solar to battery to home | Yes Up to 11.04 kW output | New installs, big loads, strong backup |
| BYD Battery-Box Premium HVM | 8.3–22.1 kWh 2.76 kWh modules | 10 years Conditions apply | 96% or more | Yes With a compatible inverter | Value per kWh, homes with a compatible hybrid inverter |
| Sonnen | 10 kWh nominal (Evo) Hybrid model: 2.5–15 kWh | 10 years | Ask us | Yes Model dependent | Heavy daily use: EVs, pools, large air con |
Not sure which battery suits your home? Get a free battery comparison and we’ll recommend the right one for your roof, inverter and power bills.
Battery Rebates in Perth
Two rebates can lower the cost of a solar battery in Perth, and they stack, so you can claim both. We apply them to your quote and handle the paperwork.
Federal Cheaper Home Batteries Program
Running since 1 July 2025, this federal program takes a discount off the price of eligible batteries installed with new or existing rooftop solar. Your installer applies it at the point of sale. Since 1 May 2026, the full discount applies to the first 14 kWh of usable capacity, with smaller discounts above that, and the rate steps down every six months.
WA Residential Battery Scheme
Synergy customers can get a rebate of up to $1,300 on an eligible battery, and Horizon Power customers in regional WA up to $3,800. The battery needs at least 5 kWh of usable capacity, must be on the approved list, and you need to join a virtual power plant (VPP). Eligible households can also apply for a no-interest loan of up to $10,000.
For prices after rebates, see our solar battery cost guide and our solar rebates guide.
How to Size a Battery for Your Perth Home
The right battery size depends on how much power you use between sunset and bedtime.
Rough sizing guide for Perth homes:
- Small households (1–2 people): about 5 kWh
- Average households (3–4 people): about 10 kWh
- Large households or heavy users (ducted air con, pool, EV): 13.5 to 20 kWh
Perth-specific things to consider:
- Summer air conditioning: ducted reverse-cycle air con drains a battery much faster than a single split system.
- EV charging: a typical EV needs 10 to 15 kWh per charge. A 10 kWh battery can’t cover an EV charge and your evening household use at the same time.
We review your actual bills and usage data before recommending a size. We don’t recommend the biggest system, just the right one for your home.
When a Battery May Not Be Worth It
A battery isn’t the right choice for every Perth home. It may not pay off if:
- Your evening use is very low (2 to 3 kWh), which stretches the payback period
- You already use most of your solar during the day, for example if you work from home
- You plan to sell within 3 to 5 years: solar panels alone may add more value at sale
- It would stretch your budget: solar first and a battery later is a sensible approach
We’ll tell you honestly if a battery doesn’t make sense for you.
Can I Add a Battery to My Existing Solar System?
Yes. Most Perth homes can add a battery to an existing solar system. The cost and work involved depend on your current inverter:
- String inverter: you’ll usually need a new hybrid inverter, or a Tesla Powerwall 3 with its built-in inverter
- Enphase microinverters: the Enphase IQ Battery 5P connects directly to your existing system
- Hybrid inverter already installed: many are compatible with BYD batteries; we check before you buy
- Older switchboards: some homes need a switchboard upgrade first, which we assess on site
Read more about adding a battery to existing solar.
Solar Battery Installation in Perth
Middle Swan Solar is a family-owned solar and battery installer based in Midland. We install home batteries across the Perth metro area, from Ellenbrook and the Swan Valley to Joondalup, Canning Vale and Rockingham.
How your battery installation works:
- Free site check and battery sizing based on your power bills
- A written quote with all eligible rebates applied
- Installation in a safe, compliant spot: garage, wall or outdoor-rated enclosure
- Switchboard upgrade, if your home needs one
- Commissioning, app setup and a walk-through on the day
- Rebate paperwork for the federal and WA battery rebates, handled for you
Why Perth homeowners choose us:
- Platinum Enphase installer: the highest level Enphase awards
- Certified Tesla Powerwall installer
- We also supply and install BYD and Sonnen batteries
- We service every battery we install
Solar Battery FAQs
Which battery is best for Perth homes?
It depends on your system. The Enphase IQ Battery 5P suits homes with Enphase microinverters. The Tesla Powerwall 3 suits new installs and homes with big power needs. BYD offers strong value if you already have a compatible hybrid inverter, and Sonnen suits heavy daily use.
How much does a solar battery cost in Perth in 2026?
The price depends on battery size, brand and your existing system, less any rebates. See our solar battery cost guide, or get an exact price with a free quote.
Do solar batteries work during a blackout?
Only if the system is set up for backup. The Tesla Powerwall 3 has backup built in, the Enphase IQ Battery 5P needs the IQ System Controller, and BYD depends on your inverter.
How long do solar batteries last?
Most come with a 10 to 15 year warranty. The Enphase IQ Battery 5P is covered for up to 15 years or 6,000 cycles, and the Tesla Powerwall 3 for 10 years. Read more about Enphase battery life expectancy.
Can I get a battery without solar panels?
You can, but you’ll get the biggest savings and rebates when the battery is paired with solar. We’ll advise on the best set-up for your home.
How long does battery installation take?
Is a solar battery worth it in Perth in 2026?
For most homes that use a lot of power in the evening, yes. The gap between 32.37c to buy power and 2c to export it makes stored solar worth far more. If your evening use is low, we’ll tell you honestly.
Ready to Get a Solar Battery Quote in Perth?
Contact Middle Swan Solar for a free, no-obligation assessment. We’ll review your existing system, power bills and goals, and recommend the right battery for your home.